Sealing tool



Nov. 28, 1939. ADAMSQN 2,181,755

SEALING TOOL Filed April 5, 193'? 2 Sheets-Sheet 1 l8 INVENTOR. ANDREWE. A DAMSON A TTORNEY.

Nov. 28, 1939. so 2,181,755

' SEALING TOOL Filed April 5, 1957 v -2 Shoots-Sheet 2 7 ATTORNEY.

Patented Nov. 28, 1939 UNITED STATES SEALING TOOL Andrew E. Adamson,Warren, Ohio, assignor to Brainard Steel Corporation, Warren, Ohio, a

corporation of Ohio Application April 5, 1937, Serial No. 135,188

1 Claim.

This invention relates to a sealing tool and more particularly toadevice for deforming portions of overlapped metal strap ends and asleeve embracing the same. The deformations consist of swaged or bentportions on the side edges of the overlapped ends and of the sleeve andto this end the sealing device includes a pair of clamping jaws havingdies thereon for clamping the sleeve to the overlapped ends, the diesswaging or bending portions of the side edges of the assembled ends andsleeve.

The deformation of the sleeve and strap ends requires the application ofa large force to the jaws and since the tool is manually operated 15means must be provided to multiply the force exerted on the handleportions. My invention contemplates a novel force multiplyingarrangement in which the force exerted by the primary or handle leveracts in a. straight line on a toggle 20 assembly connecting the jaws,means being provided to effectively prevent any canting of said primarylever thereby preventing any binding of the parts with consequent lossof effective force.

Another object of the invention is to provide a 25 tool for the purposedescribed having relatively few and easily constructed parts and whichis strong, durable and compactly arranged. The arrangement of theelements of the tool is such that each element may be made sufficientlyheavy 30 to withstand long and severe usage.

A further object of the invention is to provide a tool for the purposedescribed having a movable fulcrum for the primary operating lever, themovable fulcrum consisting of spaced parallel rack and pinionarrangements, parallel to and evenly spaced from the plane including thedirection of application of the operating force on said lever.

These and other objects and advantages of the invention will becomeapparent from a consideration of the drawings and the following detailedspecification.

In the drawings:

Figure 1 is a plan view of a preferred embodiment of the invention;

45 Figure 2 is a side elevation of the same;

Figure 3 is an end view of the tool of Figures 1 and 2; and

Figure 4 is a side view of a portion of the tool with a side frame plateremoved.

50 The tool consists generally of the stationary frame including the twospaced parallel side plates 66 to which is attached the foot 62-66,

the clamping and deforming jaws 58 pivoted on the frame, the operatinglever 65, and the hereinafter described force transmitting andmultiplying means between the operating lever 85 and the jaws 58.

Side plates 66 are each provided with a vertically extending slot 36 andan integral arm 8| which is riveted or otherwise suitably secured to 6the foot 62. An extension 66 is rigidly secured to the foot 62 and isprovided at its free end with a downwardly bent portion 56 to form asupport for the tool and to resist the overturning moment caused by thedownward force exerted 10 on the operating lever 65. The seal formingjaws 58 having clamping lips 38 and extended portions 31 are pivotallymounted on spaced parallel pins 61 extending transversely throughaligned apertures in the lower central portions of the side plates 66.To aid in maintaining the proper spacing of the plates 66, spacingcollars 41 of the required width are interposed between the side facesof the jaws 58 and the inner faces of the plates 66.

A rack bar 6| having integral teeth 35 is positioned on the innersurface of each plate 66 adjacent a side edge thereof and is rigidlysecured by the cap screws 12 threaded into the rack and by the bolt llpassing through both rack bars 6|, both side plates 66 and provided withthe nut 86. The central portion of the bolt II is encompassed by aspacing sleeve to hold the parts in proper position.

Meshing with the teeth 35 of the racks 6| are the teeth 36 of the gears63. The gears 63 are preferably cut from a fiat plate and are providedwith integral arms 33 riveted or otherwise suitably secured to a block64 which in turn is rigidly fastened to the handle 65. The gear 35 teeth36 are circularly disposed about apertures in the members 63 receivingthe pivot bolt 69 the outer ends of which pass through the verticallydisposed slots 36 in the plates 66. It is thus made apparent thatmovement of the lever 65 40 results in vertical movement of the pivotbolt 69.

The extended portions 31 of the jaws 58 are forked as shown more clearlyin Figure 3 and to these forked ends are pivoted the toggle links 89,89' by means of the pivot pins 68. This construction provides forportions of the jaws being positioned in the space between the rack barsand being guided thereby. The pins 68 are held in position by lockingpins 14. One of the links 89 is provided with a forked end having atransverse aperture to receive the pivot bolt 69. The width of this endis sufiicient to engage the inner surfaces of the gear members 63 tohold them in their proper spaced relation. The other of the links 89' isof uniform width with one end 6 ntting'within the forked end of thefirst link and apertured to receive the bolt 69 and with the other endpivotally attached to a jaw 88 as explained above.

Outward movement of the forked ends ll of the Jaws 88 results in inwardmovement of the lips 88 and the dies 16 carried with the jaws. Inoperation, the jaws are moved to retracted position by moving lever 65to its uppermost position, the movement causing the pivot bolt 68 tomove upward and the outer ends 31 of the Jaws to move inward. overlappedreaches of the strap and an encompassing sleeve are positioned adjacentthe anvfl 11 and as the working portion of the jaws move togetherbyreason of the downward movement of the handle 85 and pivot bolt 69,the lips 38 clamp the sleeve about the overlapped straps and the dies 15cause a cylindrical or other shaped deformation to be made in the sideedges of the assembled seal.

The provision of the double spaced rack and pinion fulcrum enabling thetoggle assembly to be positioned within the same results in anexceedingly strong and rugged tool. Moreover, such interfitting of theparts enhances the compactness of the assembly with a consequentdecrease in the weight thereof and an increase in its usefulness.

By the use of the substantially spaced racks and pinions the lateralstability of the operating or force transmitting members of the tool isinsured and thus any danger of canting or binding of the parts iseliminated. This is especially true aromas toolis the D- andatapointevenly spaced from the planes ofthe racks and pinions. This results in amaterial decrease in the. frictional losses of the tool and in the forcerequired to be applied to the grip ll of thelever O! to cheat a givenseal.

Asmanychangesmayb'emade inthespeciflc embodiment of my invention, asherein disclosed, without departing from my invention, the specificdisclosure should be considered as illustrative rather than limitive ofthe invention, the scope of which is indicated by the following claim.

I claim:

A sealing tool comprising a base, a pair of sealing jaws pivotallymounted on said base, toggle levers pivotally connected with said Jawsfor actuating the same, a pair of spaced parallel rack bars on saidbase. an operating lever having a forked end with arcuately disposedgear teeth on each fork meshing with the teeth of the rack bars, a pinspanning said forked end and positioned centrally with respect to saidarcuately disposed teeth, means engaging said pin to guide the same formovement in a rectilinear path parallel with said racks, said togglelevers being pivotally connected with said pin and being partiallywithin the forked end of said operating lever, portions of said Jawsbeing positioned in the space between the rack bars and being guidedthereby.

ANDREW E. ADAMSON.

